Gas-burner.



L. H. BRADY. GAS BURNER. APPLIOATIONIILED SEPT. 2-1, 1907.

942,709. Patented Dec. 7, 1909.

2 SHEETS-SHEET 1.

Mimosa.- U Ihvenion, I I w Loam/{Brady L. H. BRADY.

GA$ BURNER.

APPLIQATION FILED SEPT. 24, 1907.

Patented Dec.'7,1909.

2 SHEETSSHEET 2.

' Inven 07; Law H. Brady UNITED STATES PATENT OFFICE,

LOUIS H. BRADY, OF KAN SAS CITY, MISOURI L GAS-BURNER.

v Specification of Letters Patent. Patented Dec, 7, 1909. 1

Application med September '24, 1907'. Serial a... 394,283:

To all whom it may concern:

Be it known that I, LOUIS H. BRADY, a citizen bf the United States, residing at Kansas City, in the county ofJackson and State of Missouri, haveinvented certain new be easily removed wit out disturbing the others, so that the cost of repairs or renewal of parts may be reduced to a minimum.

The invention provides for a thorough admixture of gas and air and an equal distribution of heat beneath the boiler, so that the greatest economy and efliciency will be had. n

It also provides for rapidly increasing the capacity of the burner above normal so that -in case of an emergency the temperature of the boiler may be instantly raised.

- Other features of the invention will hereinafter appear, and in order that it maybe fully understood, reference will now be made to the accompanying drawings, in which: J p Figure 1 represents a horizontal section, on line II of Fig. 3; of a boiler-furnace provided with my improved gas burners. Fig. 2 represents a vertical section of same on line II II of Fig. 1. Fig. 3 represents a broken front elevation of the boiler-furnace pro ed with my improved burners. Fig. 4 is ngitudinal section of one of-the burners in an operative position in the front part of the furnace. Figs. 5, 6, and rare cross-sections on lines V, VI, and VII, re-

spectively,of Fig. 4.

1 designates a furnace of \ordinary con-- struction, provided with; the customary bridge-wall 2.

' 3 designates a ferred form. y v 1 l 4 designatesa 'pair'of short burners which only extend through the front wall o f/the furnace so that the flames therefrom will beneath the entire lengthofthe boiler.

5 designates a pair of Ion burners which I extend through the front wa l-of the furnace and the bridge-wallysothat the flames issuing therefrom will discharge into the com- "bustion-chamber 6. This arrangement of. l

short and long burners insures an equal distribution of heat throughout the furnace and consequently the boiler will be uni;

formly heated its entire length. Allof the G0 burners receive theirsupply of gas from a header 7, ext ending across the front of the furnace and communicating with the burners through supply pipes 8, which are proided with valvesj9for controlling the How 55 f gas to the burners. By thus supplying ithe burners separately it is obvious they can be controlled independently of. each other. The burners being alike except as to' length,

I will-proceed ,to describe but one of them in detail, reference being had more particularly to Figs. 4 to 7, inclusive. 10 designates a tubular casing which is firmly set in the fi'ont wall of the furnace for the purpose of reliably supporting the movable parts of-thebur'ner.-

11 designates a mixing-tube which is .arranged concentrically within the casing, to leave an annular air-passage 12 between it and said casing. The forward end of tube 11 terminates a short distance within the forward end of casing 10 so that the latter will protect the forward end of a slidingdamper, hereinafter described, from the flame. Tube 11 is supported within casing 8-5 10 by fingers 13 and set-screws 14;, which latter are screwed tightly into contact with the tube, to reliably hold it in position while in operation or permit of itsremoval'when it is desired'to repair or renew the same.

15 designates a mixing-chamber, the "forward tapered end of which frictionally .engages the rear end of the mixing-tube, so that when necessary it may be removed therefrom. Said mixingchamber is 'provided at its enlar ed open end with a cap 16 which is remove for the admission of air wheh the burner is in operation. To provide for a thorough admixture of I v I v air'and gas, ll discharge the latter from a boiler of ordinary or pre-' fore discharging into the furnace. Ring 17 .is provided at its rear side with perforations 18 so that the suction created by the air passing through the mixing-chamber 15 and tube 11 will draw the gas from the ring instead ofimpe'ding its discharge therefrom,

hence there ,will be no danger of'the flame passing backward into the boiler-rooma 19 designates a union whereb the ring is connected to its respective supp 'y-pipe 8. v The sliding damper, above referred to, consists of a rod 20, a knob 21" at the rear end thereof, and a disk 22 atttheforward end thereof. Disk 22 is perforated to comminute and insure a thorough admixture of the air and gas at its discharge from the for ward end of the tube 11. Said damper ex- F ment of the damper. is

' tends through the mixin -tube. and part1 through the mixing-cham er, it being sli ingly and centrally supported within the mixing-tube by a .pair of bearingsin the form of screw-eyes 23. vThe sliding movelimited by a pair of stops 24 extending. through rod 20 and adapted to contact with screw-eyes 23'. By arranging knob 21- within-the m1xing-bhamber 15, where it will be exposed to the cold air entering said chamber, it is obvious that said knobiwill not become too'warm to be grasped with the bare hand, and hence the damper may be operated without discomfort to the attendant 25 designates an annular damper surrounding the rear end of casing 10 andthe tapered portion of mixing-chamber 15 i a ainst'said perforated-wall and insure coma 7 quantity of air.

for the purpose of regulating the flow of air to the air-passage 12, -wh1chis;accomplished by sliding the damper forward more or less upon the casing to admit the desired This damper, however, is onl openediin case of an emergency when it is esirable to rapidly increase the capacity of the burner above normal. It is rovided with a pair of handles 26 to faci itate its manipulation. V k 1 27 designates a perforated-wall within the furnace between the bridge-wall 2 and the inner ends of the short burners, so that the flames discharged gtherefrom' will impinge tube '29 the gas issuing from the nozzle wi1lheroine ignited and .will extend into the furnace through tube produce a flame which 29. Hence when the short burner adjacent thereto is turned on the gas therefrom will become ignited and produce a flame,

' disk 22, so that "the a ditiona air and gas will become thoroughly mixed casing, a mixin of less diameter P 1 in turn will ignite the gas fromthe other burners when they are'turned on.

In operation, cap 16 is removed from the mixing-chamber so that the supply of air through the'latter and the mixing tube will be controlled entirely by thesliding-damper which is adjusted to admit the desired quantity of air. Although suflicient air for ordinary purposes maybe admitted through the mixing-chamber, in case of an emergency requiring a, rapid increase in temperature, va ve 9 is opened to its full capacity and the annular dam er 25 .is also opened to admit anadditiona supply of air for the additional supply of gas. mixture dlschargps from the-forward end of the mixing-tn e it will be spread in funnel-form across the path of the inflowing air entering through pass 12, b

supply of before ignition "takes place. 1

Having thus described my invention, what I claim 1s: 1 I

1. A gas-burner consisting of a. tubular -tube arranged concentric- ,ally therein an of less diameterthan the same to leave an annular airassage between it and the casin means or controlnieans of Then as the rich adhug the flow of air "t rough said assage,

means for discharging) gas into t e mixing tube, and a slidin -damper extending ahrough said mixing-tu for regulating the How of air therethrough.

2. A gas-burner consisting of a tubular casing, a mixing-tube removably arranged within the casing and of less diameter than the same'to leave an annular air-passa e between it and the casing, a damper sli ingly mounted within the mixing-tube, and "an annular damperrfor controlling the-flow of air. through the. air-passage between the casing and the mixing-tube.

3 A gas-burner' consisting of a tubular cas1ng,'a mixing-tube arranged"therein and than .the same toleave an annular air space between it and the casing a mixing-chamber having a tapered end communicating with the ruining-tube, annular dam er, slidingly embracin casin and a a ted 'to contact with the pere portion 0 themixingwhamber, means "for discharging gas into the mixing-chamber,

and a'damper in the mixin .-tube=for controlling the flow of air theret rough. y

In whempfL fli yf lgin ure,

o witnesses. 1;

in the ,presen' v Hf BRADY.

witnes esrf the 

